Remove columns from users and application settings

What does this MR do and why?

Follow-up to remove ignored columns.

User's columns marked as ignored - !130739 (diffs)

Application setting's column marked as ignored - !130611 (diffs)

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #424270 (closed)